code: def testZero(self):
      self.assertEqualVector(
          AutoCorrelation()(zeros(1024)), zeros(1024)
      )
  
file_path: essentia/test/src/unittests/stats/test_autocorrelation.py
imports: from essentia_test import *
label_desc: Use image node_id 4 for calling the TestAutoCorrelation obj's underlying member method code with example usage: obj.testZero() without return types